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. 1987 Mar;169(3):1254–1259. doi: 10.1128/jb.169.3.1254-1259.1987

Influence of GATC sequences on Escherichia coli DNA mismatch repair in vitro.

A L Lu
PMCID: PMC211927  PMID: 3029029

Abstract

The effect of the number and position of DNA adenine methylation (dam) sites, i.e., d(GATC) sequences, on mismatch repair in Escherichia coli was investigated. The efficiency of repair was measured in an in vitro assay which used an f1 heteroduplex containing a G/T mismatch within the single EcoRI site. Both an increase in the number of dam sites and a shortened distance between dam site and mismatched site increased the efficiency of mismatch repair. The sequences adjacent to d(GATC) also affected the efficiency of methylation-directed mismatch repair. Furthermore, heteroduplexes with one extra dam site located close to either the 5' or 3' end of the excised base increased the repair efficiency to about the same extent. The findings suggest that the mismatch repair pathway has no preferred polarity.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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